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GraphML的擴(kuò)展是基于xml的擴(kuò)展方式,，通過增加namespace的引用就可以容易地?cái)U(kuò)展GraphML,，包括xml屬性的擴(kuò)展和Complex Type的擴(kuò)展,。 屬性擴(kuò)展 xsd定義：graphml+xlink.xsd  <?xml version="1.0" encoding="UTF-8"?><xs:schema targetNamespace="http://graphml./xmlns" xmlns="http://graphml./xmlns" xmlns:xlink="http://www./1999/xlink" xmlns:xs="http://www./2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified"> <xs:import namespace="http://www./1999/xlink" schemaLocation="xlink.xsd"/><xs:redefine schemaLocation="http://graphml./xmlns/1.0/graphml.xsd"> <xs:attributeGroup name="node.extra.attrib"> <xs:attributeGroup ref="node.extra.attrib"/> <xs:attribute ref="xlink:href" use="optional"/> </xs:attributeGroup></xs:redefine></xs:schema>例子 <?xml version="1.0" encoding="UTF-8"?><graphml xmlns="http://graphml./xmlns" xmlns:xlink="http://www./1999/xlink" xmlns:xsi="http://www./2001/XMLSchema-instance" xsi:schemaLocation="http://graphml./xmlns graphml+xlink.xsd"> <graph edgedefault="directed"> <node id="n0" xlink:href="http://graphml."/> <node id="n1" /> <edge source="n0" target="n1"/> </graph></graphml>Complex Type擴(kuò)展 xsd定義： graphml+svg.xsd
<?xml version="1.0" encoding="UTF-8"?><xs:schema targetNamespace="http://graphml./xmlns" xmlns="http://graphml./xmlns" xmlns:svg="http://www./2000/svg" xmlns:xs="http://www./2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified"><xs:import namespace="http://www./2000/svg" schemaLocation="svg.xsd"/><xs:redefine schemaLocation="http://graphml./xmlns/1.0/graphml.xsd"> <xs:complexType name="data-extension.type"> <xs:complexContent> <xs:extension base="data-extension.type"> <xs:sequence> <xs:element ref="svg:svg"/> </xs:sequence> </xs:extension> </xs:complexContent> </xs:complexType></xs:redefine></xs:schema>例子： <?xml version="1.0" encoding="UTF-8"?><graphml xmlns="http://graphml./xmlns" xmlns:svg="http://www./2000/svg" xmlns:xsi="http://www./2001/XMLSchema-instance" xsi:schemaLocation="http://graphml./xmlns graphml+svg.xsd"> <key id="k0" for="node"> <default> <svg:svg width="5cm" height="4cm" version="1.1"> <svg:desc>Default graphical representation for nodes </svg:desc> <svg:rect x="0.5cm" y="0.5cm" width="2cm" height="1cm"/> </svg:svg> </default> </key> <key id="k1" for="edge"> <desc>Graphical representation for edges </desc> </key> <graph edgedefault="directed"> <node id="n0"> <data key="k0"> <svg:svg width="4cm" height="8cm" version="1.1"> <svg:ellipse cx="2cm" cy="4cm" rx="2cm" ry="1cm" /> </svg:svg> </data> </node> <node id="n1" /> <edge source="n0" target="n1"> <data key="k1"> <svg:svg width="12cm" height="4cm" viewBox="0 0 1200 400"> <svg:line x1="100" y1="300" x2="300" y2="100" stroke-width="5" /> </svg:svg> </data> </edge> </graph></graphml> |
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